Malicious PDF — malware analysis report

Static analysis result for SHA-256 1164a96b26e60de0…

MALICIOUS

PDF

88.2 KB Created: 2021-09-23 03:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4ad2754ca5818a09068ee92087cb532d SHA-1: 0e2b2c10c190b53d6946fb18cb8739789a031e8b SHA-256: 1164a96b26e60de08180be6af1080a93d6f4ba8c33a4e3c07d71cdf240501b1c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely attempts to trick the user into downloading a password-protected archive, a common tactic to bypass gateway security. The numerous extracted URLs, many pointing to PDF files on various domains, suggest a link farm or distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://drlalashow.com/php/billboard/uploads/file/26275909707.pdf In PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/m1aqnapb0t146gh0ou2h0cakt0/magakiber.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/18534931883.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/tufoborebejujukak.pdfIn PDF document text
    • http://yugreat.com/filespath/files/20210904080053.pdfIn PDF document text
    • https://lotusmarinevn.com/upload/files/vunupurozowo.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/55846384766.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/27967048491.pdfIn PDF document text
    • http://quatangsongvan.com/hinhanh_fckeditor/file/28183844193.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140e52555666---13745935797.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/41940209723.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/neder.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/xakujibobebarubadilodu.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/66185730182.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/vejawudugawavimumowo.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/pinuxem.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/62731761359.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/sesagofef.pdfIn PDF document text
    • https://maintogelonline2.com/contents/files/87197607194.pdfIn PDF document text
    • http://chicopharm.com/upload/files/doluzamiwinadeda.pdfIn PDF document text
    • http://coverybox.box8websites.com/ckfinder/userfiles/files/kedudutonevarulexipazize.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/kepokaj.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/59998958116.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/75715555529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+send+large+video+files+on+phonePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C00 17796 bytes
SHA-256: 7b075e4659025000fd7e9e27b67a5bd917d177f9b2a21ac3baf802d5e810aaf2
font_02_sfnt_off00013a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A43 10920 bytes
SHA-256: 35e550393a2005cb0a964052392ff6332c12b4b0d23ced38147966c96c1c1fb6